Typewriting-machine



O. WOODWARD. TYVPEWRITING MACHINE.- APPLICATION FILED APR. 10. 1919.

Patented Junes,'1920.

will/11111 \NVENTDR. 044 #M Hi5 ATTORNEY.

WITNESSES? 7 KM.

the right to begin are the opposites osoAIi. WOODWARD, or

WRITER COMPANY,

TYPEWRIVTING-MACHINE Specification of Letters Patent.

Patented JuneS, 1920.

Application filed A rii o, 1919. Serial no. 288,957.."

To all whom it may concern." Be it known that I 'Oso'AR VVoonwARn, a citizen of the United btates', and resident of Babylon, in the county of'Sufiol-kand State of New York, have invented certain new and useful Improvements in Typewriting- Machines, .of'which the following isa speci fication. r

My invention relates to typewriting machines and more particularly to means for controlling the carriage of .a typewriting machine.

In typewriting machines where the paper.

the carriage said carnage I is carried byusually steps toward the left in the operation of Writing, and it is withdrawn toward a new line; although in some machines the directions of the motions of those stated. When the carriage is withdrawn toward the right it is commonly arrested by a stop such, for

example, as a margin stop, and itis the intention of said stop to have the next line of writing begin at a definite letter space position. Due to various causes, howevr,the carriage escapement mechanism sometimes does not resume control of the carriage correctly with the result that the next line of writing is begun a letter space to the right fof the. intended position,

--:'uneven margin at the lefthand side of the resulting in an "typewritten page. There are also other instances where the carriage makes a false step when it is restored to the control of the escapement.

The principal purpose of my invention is to provide an improved means for 'overcomthe carriage to make a ing the liability ofmentioned.

false step as above My invention may 'an improvement o'nthat set forth in the application of George- A. Seib, filed December 6, 1918, Sr. No. 265,512;

To the above ends my invention consists in certain features of construction and combinations and arrangements of parts, all of which will be fully set forth herein and par ticularly pointed out in the claims.

In the accompanying drawings, in which my invention is shown embodied ina Remington typewriter,-

Figure 1 is a fragmentary rear elevation partly in section.

Fig. 2 is 'a side elevation partly in section.

' the right be regarded in part as rear, beveled, fixed Fig. 3 is a planiview showing the parts in Fig. 4 is a view similar to Fig. 3 but with. some parts omitted and showing the mechanism in the position it occupies when the carriage'is moving toward the left.

v OFF-ICE.-

BABYLON, ivnw YORK, ASSIGNOR. r0 REMINGTON VTYPEI- oration, NEW YORK, A eonro'anrroiv on NEW YORK.

Flg. 5 is an enlargediperspective view of the principal parts of my improvements.

Fig. 6 is a vertical.cross-section'of a .modification. 1 In all of the figures, except Fig. 2, the. I

mechanism is shown as viewed from the rear.

In the drawings, 1" repr 'esents the top plate of a Remington typewriter v2 the carriage 3 the feed pinion, and 4 the feed rack, escapement wheel of that machine. Said escapement wheelis fixedly mounted by means of set screws on the rear end of a shaft 6, which is journaled at its'ends in a bracket 7 secured by screws 8 to the top plate 1. The pinion, 3 is rigid on or integral with a sleeve 10 journaled on the shaft 6 and having at its rear end a drum 11 which is formed with internal ratchet teeth adapted to be engagedv by aspawl.

mounted on the front face of the escapement 7 wheel 4. The construction of said pawl and ratchet mechanism is such that the carriage cannot be moved toward the left while the rack 2 is in engagement with the pinion 3 except by'turning the escapement wheel 4 but said carriage can be withdrawn toward feed mechanism thus far described is or may be like that shown in the patent to Barney, "No-1,247,616, dated November 27, 1917. A drum 12 which is secured to a part of the bracket 7 is shown in the drawing but this drum is associated with back spacing'mechanism, not shown. The Remington carriage is drawn toward the operators left by means of a spring drum 14 which is connected to the carriage by a tape .15.- i The feed dog mechanism comprises a dog rocker 16 pivoted on two cone pivots 17 mounted in a bracket depending from the top plate connected key of the machine.

with the universal bar and space The dog rocker has a dog 20 and a stepping dog 21, the latter pivoted at 22 and adapted to vlbrate between stops 23 and 24, a spring 1, and having an adjustable arm 18 55 the posit on they occupy when the carriage 1s returnlng or moving towardthe right.

' chine which result in the dog 21 getting misplaced with reference to the lowermost tooth of the escapement wheel. 4. For example, if the carriage is stepped down to the left until it is arrested by a stop there is no longer anything to turn the wheel 4-be cause 'thecarriage can move no farther. If

then the space key or a character key is op- 1 erated and the rocker 16 is thereby vibrated,

the dog 21 will move out of engagement with the escapement. wheel and will be thrown backby the spring 25 against the stop 24,

and when the rocker comes back to: its normal position thisdog will come in behind the lowermost tooth of the wheel instead of infront of it as-it should be.

'bythe escapement mechanism. thing would happen if the carriage was That is to say,'it will. stand at the right of said, tooth in Fig. 1 instead of at the left of it; 'If

now the feed rack be raised out of the pinion 3 and the carriage be drawn back to the operators right until it is arrested by the margin stop andthe rack then restored to engagement with the-pinion 3, the wheel 4 will be free to make substantiallyan entire step after the rack comes .into engagement with the pinion," and the-carriage will not stand in the position; intended. For example, if the'margin stop was set to begin a;

new line of writing at the point 10 on the carriage scale it will under these conditions drop down to point 11 before bein arrested 2 similar drawn back without raising the rack. There are various other conditions under which this or similar errors can arise. It has heretofore been proposed to place in the escapement mechanism a third dog sometimes.

called a margin dog to hold the escapement wheel 4 in case of a false operation whereby the stepping dog is displaced ,as above described. Such a margin dog is shown in my prior application filed Sept. 3, 1918, Fr. No. 252,377. The margin dog shown in said application is effectual to prevent the error above described but it is mounted on the dog rocker and it vibrates into and out of the escapement wheel, at the same time as the two escapement dogs, and it has been found that in very rapid operation it is preferable feed rack-2 andit has mounted thereon a that the margin dog be not so mounted asto vibrate with the escapement dogs but that during the operation of, writing it be held out of action. A margin dog so held out is shown in the application of George A. Seib hereinbefore referred to., My invention is an improvement on that set forth'in said Seib application, and includes a margin dog 26 and a detent or dog 27, both adapted to all as shown m Fig. 1.

with. a back portion pariallelwith its face 7\ preferablyabove the endof the tooth which is engaged by the escapement dogs 20, 21,

The detent dog .27 consists of an arm of sheet metal pivoted one-stud screw 28 which 1 at its lowerend is screwed into a: base .plate 30, which is'secured to the top plate 1 by screws 31 passing through slots in said base plate-so as to allow of adjustment ofthe mechanism toward and from the escapement 8 5 wheel. The pivot screw 28 is elongated upward and the dog 27 is bent to form a vertical yoke piece 32 and again toform a horizontal ear 29 which is pivoted on the screw 28 near the top thereof so that thedog 27 has pivotal bearing on the screw at twov points, widely separated, whereby said dog is. accurately guidedfin its vibratoryomovementsr I This .dog normally occupies the position.

shown in the drawings, and .it clicks in behind. each escapement 'wheel 7 tooth that passesit. Y

The margin dog 26 is also pivoted on the screw 28vbeneath and above the dog 27, said margin dog being so shaped and-bent as to include a vertical yoke-piece33 and. a long horizontal arm 34, the latter of which ispivoted on the screw 28-at the top thereof.

As here shown the yoke-piece 33 is alittle K;- longer than theyoke-piece 32' sothat the,1'05

two folds of the dog 27 are included be tween the two folds .of the dog 26 wheresaid dogs are pivoted on the screw. Aspring 35 coiled about the screw 28 is. under torsional:

stress and at one end is'connected with the .110

dog 27 and at the otherend with the dog 26 so that said spring acts on both dogs at once and tends-to move the detent dog 27 toward vthe front of the machine and the margin dog 26 toward the rear of'the ma- 11 5 chine. Preferably said detent dog is situ-- ated back of the wheel4and the margin dog is situated in front of said wheel, hence the tendency of the spring is to move both dogs into engagement with the wheel.

The arm 34 extends forward beneath the T-shaped piece of spring-steel including an arm or shank 36 which is secured to the top of the bar'34 and a shoe 37 by the resilience of the arm 36 into frictional engagement with the toothed under edge of the rack 2. This engagement occurs however only when said rack 2 is in normal position in engagement with the pinion 3. 130 g pressed upward 1 25 j with said pinion the shoe out of engagement 37 does not follow to the full extent of. its motion W hen said rack is'raised it upward I and the rack therefore moves out of contact 1 against the pressure of the spring 35.

spring is So designed and regulated'that its '60 shown attached to the rack.

with the shoe. The construction is such that when the carriage is moving toward the left, that is to say, toward the right as viewed in the drawings and as indicated by the arrow in Fig.4, the friction of the rack 2 on the shoe 37 tends to swing the dog 26 out of engagement with the escapement wheel .4 to the position shown in ressure is not sufficient" to overcome the frictional tendency of the arm 36, so that during'the operation of writing the dog 26 is held'ont of action, that is to say, out of engagement with the escapement wheel, as shown in Fig. 4.

When, however,- move-the carriage spring immediately the rack 2 is raised to in either direction the brings the'margm dog 26 into action and it is maintaned in engagement with the wheel after the rack is restored and until moved out of engagement as hereinafter described. Furthermore if the carriage be moved toward the operators right, that isto say, toward the left in the drawings, as indicated by the arrow in ig.

3, then the friction on the prevent the springg35 from moving the margin dog into engagement with the escapeinent wheel.

'The arm 36 is seouredito. the arm 34jby screws 38. In order to. prevent the flexure consisting of a top of the arm of the arm 36 from coming atthe point where one of these screws passes throughit, which of course would be the weakest point of the arm, I have provided a guard 40 clination at 41; and the screws 38 clamp the spring arm 36 between the arm 54 and guard 40. It results from this construction that the flexu're of the arms 6 comeschiefiy at the point where said arm emerges from un- 1 der the bend 41 so thatsaid arm 36 is much less likely to be brokenor weakened by repeated flexure and recovery.- By using screws at '38 instead of rivets, the shoe 37 can easily be replaced with'a new cheat any time.

Instead of having the shoe engage directly with the rack teeth engage witha plain. untoothed bar attached to any suitable part of the carriage or to the rack and extending down slightly beyond the points of the rack teeth, as shown at 2 at Fig. 6 where this supplemental bar is the margin dog 26 posi- In order to move ement with the escapetively out of enga ment wheel at the rocker, said dog rocker is provided with an 1 4 and said.

- arm 34 and serving shoe 37 does not v strip of sheet metal lying on- 36 and bent upward at an inof striking against it may with like results rst operation of .the dog adjustable screw. .42 having its end lying I 43 bent down from the" just behind an ear dog 26. When the parts are in the position showninF'ig. 3 the screw 42is in contact 'or nearly so with theear 43 and when the dog machine by the depression of 'a key, said screw pushesthe margin dog positively out of engagement with the wheeL- As the carriage then begins to step toward the'opera-- tors left the friction of the shoe 37 on the rack 2 will mainta n the dog in its inopera-' it. The other branch 46'of this bracket 44 rocker is moved toward the frontof the and until said rack is again-raised or 80 distance forward of the far enough to injure is elongated and servesas a stop to limit r the extent to which the margin dog can move away from the escapementwheel.

The escapement wheel itself,- as wellas the screw 42, can limit the motion of these parts 1- in the opposite direction. a

.The.mot1on ofthe detentdog 27 is limited in both directions by an ear .47 bent .downw-ard therefrom into anotch 48 consisting of the space between two arms 50 of the case bracket 30.

end adapted. to come'into holding engagement with the 'tooth of the 'esc'apement wheel as shown in the drawings, and it also has an inclined part 49 on coming tooth'of the wheel has a'oam action, and which also itself has a cam action on the tooth of the wheel.

.This dog has an abrupt 5- which the on- If at the end of. a.

line orin some other way-the dog 21'v has I gotten in .betweentwo of the teeth of the escapement wheelinthe manner above described and said escapement wheel assumes some intermediate position where the inclined part 49 of the detent dog is pressed v against-one of the teeth of said wheel, said inclined part tends to cam the wheel in a direction .the reverse of its ordinary direction of motion until such, reverse motion of the wheel is arrested by the next tooth therethe end of the dog, thus I enabling the margin dog 26 to move into enageme'nt-with said tooth.

It will be perceived that I have mounted the entire margin controlling mechanism including the margin dog 26, the detent dog 27, and the spring 35 for controlling said dog allon the base 30, and thatthe stopfor arresting'the motion of the margin dog consists of an ear 46 bent up from said base.

This entire piece of mechanism is thus made as a unit that can beput onto the machine and taken off as an entirety and which can be adjustedasan entirety with relation to the escapement wheel, such adjustment bethem engage the'same tooth" of said'wheel that is'controlled 21. This is partly perceived the feed dogs 20' and dueto the improvedac- I. curacy due to having everything that c'onwheels with different numbers of teeth. The wheel shown in the, drawings. has

triage tion with armed margin dog, one arm adapted to entrols the escapement wheel engage at the 4 same .point, but also tothe factthat difier ent typewriting machines sometimes have different letter spacing, asfor example twelve letters to the; inch, and ten letters to .the inch, and other spacings are also provided for. These differences in spacing are brought about by employing escapement twelve teeth; another wheel might have ten teeth, ands'o on; and -ifthe margin dog and I detent do not engage escapement v these partswould have to be made differently for different machines onaccount of the same tooth of the wheel as the feed dogs, then the different spacing of the teeth. I Various changes can be made in the details of construction and arrangement with- V,

out departing from my invention.

at I claim as new by Letters. Patent, is: ,1. In a typewritingmachine and incarcontrolling mechanism, the combinaan escapement wheel, of a two gage the escapement wheel and the other provided with a shoe having a spring shank,

and a guard mounted on vent improper bending.

2. In a typewriting machine and in carriage controlling mechanism, the combination with an escapement wheel, of a twosa-id shank to prearmed margin dog, one arm adapted to engage the escapement wheel and the other provided with'a shot? having aninclined spring shank bendable toward said arm, and an overlying, guard havingan inclined lip to prevent improper bending of said shank. v

3. In a typewriting machine and in carriage controlling mechanism, the combination with an escapement wheel, of a margin dog and a detent dog having a common pivot and both said dogs having yoke portions at said pivot, the yoke portion of one dog being arrangedwithin the yoke portion of the other dog.

4; In a typewriting machine and in carriage controlling mechanism, the combina- 1 riage controlling and desire to secure" opposite faces thereof, and a tion with an escapement wheel, of a margin dog comprising two arms at substantially right angles to each other and having a junc t1 on yoke, and adetent dog also having a yoke fitted within the yoke dog, both of said yokes being pivoted.

of the-margin 0,

5.- In a typewriting machine and in ca r- ,riage'controlling mechanism, the combinaunction. yoke, a detent dog also having a yoke fitted within the yoke of the margin.

dog, both ofsaid yokes having a common detent dog.

- pivot, and a spring common to said margin dog and said 6. In a typewriting machine and in carlriage controlling mechanism, the combination with an escapementwheel, of a margin dog comprising two arms, a detent dog, a common pivot for both said dogs, and a coiled spring both dogs, one end of the spring pressing against the detent dog and the other end of the spring pressing against the margin dog.

7 In a typewriting machine and in carmechanism, the combination with an escapement wheel, of a margin dog and a detent for engagement with said riage controlling mechanism, the combinatlcn with an escapement wheel, of a margin dog and a detent pivoted on'a common pivot, and a single spring for drawing-said margin dog and detent into engagement with said wheel.

'9. In a typewriting machine and in car riage controlling mechanism, the combination with an escapement wheel, of a margin dog and a detent engaging said wheel from single spring for drawing said margin dog into engagement with said'wheel.

n a typewriting machine and in car'- around said-pivot common to .wheel, said margin dog and detent being pivoted to a stationary part of the machine and detent riage controlling-mechanism, the combination with an escapement wheel, of a margin dog, and a detent for rotation of said wheel, said margindog and v detent both engaging the same tooth of said wheel.

11. In a typewriting machine and in carpreventing backward riage controlling mechanism, the combina-' tion with an escapement Wheel and a feed dog, of a margin dog, and a detent for preventing backward rotation of said both said margin dog and said detent ilng the same tooth of said Wheel as said feed 12. In a typewriting machine and in carriage controlling mechanism, the combination with an escapement wheel and a feed Wheel, enga dog, ofa margin dog, and'a detent for preventing backward rotation of said wheel,

said margin dog and said detent both being mounted on a stationary part of the machine and both engaging the same wheel as said feed dog.

13. In a typewriting machine andincarriage controlling mechanism, the combination with an escapement drawing said mar tion with an escapement .wheel and a feeddog, of a detent dog for preventing backward rot tion of sald wheel, said dog being vpivoted on a stationary part to swing in and out transversely of said Wheel and en gaging the same tooth ofsaid wheel as said feed do'g.

14. In a typewriting machine and in car riage controlling mechanism, the combina wheel, and its feed dogs, of a margin dog and a detent both en gaging the sametooth of said-wheel as said and one engaging said wheel from and the other from the front;

feed dogs, the back thereof.

'15; In a typew'riting machine and in car-' riage controlling mechanism, the combination with an 'escapement Wheel and its feed dog and a detent pivoted" dogs, of a margin on a common plvot, a single spring for into engagement with said wheel, and means normally restraining said margindog vfrom engagement with said wheel.

16. In a typewriting machine and in car-. vriage controlling mechanism,

the combination with an escapement wheel and its feed dogs, said feed dogs engaging the bottom toothj of said wheel, of a detent pivoted to a stationary part of the'machine and lying horizontally and engaging the said bottom tooth to retain said wheel against backward rotation.

17. In a typewriting machineand in carriage controlling mechanism, the combination with an escapementwheel. and its v1- bratory feed dogs, of a base plate detach-..

ably andadjustably mountedon a stationary part of the machine, a pivot on said" base plate, and a margin-dog a'nd'a detent;

both mounted on said pivot.

18. In a typewriting machine and in carriage controlling mechanism,

tion with. an escapement'wheel and its" vibratory feed dogs, of a base plate detachably and adjustably mounted on a station-I ary part of the machine, a pivot on said base plate, a margin dog and a detent both mounted-on said pivot, and a spring coiled about said pivot and controlling both-said margin dog and said detent.

19. In a typewriting'machine and carriage controlling mechanism, the combination with an escapement wheel, of a dog for engagement wlth said wheel, a base plate mounted on a stationary part'of the matooth of said gin dog and said detent the combinachine and-to which sa id is pivoted, and an ear Vbent up from vsaid base "plate and having one part-thereof in position to prevent bendingof an arm of said dog, and an-v other part thereof constituting 'a' stop to limit the motion of saiddog about its pivot.

20. In atypewriting machineand in-carriage controlling mechanism, the combinaone arm for engagement "with said wheel tion with a releasable ,feed rack and .an- I escapement wheel,'of a margin dog having] andanotherarm having frictional connec tlon wlth sa d rack, a base plate to which said dog is p1voted,a"nd an ear bentup from lying beneath the second mentioned arm of said dog'to prevent bending .of said arm and sald ear. having also a finger to act as a stop to limit the motion of said dog about its pivot,

21. In a typewriting' machine and in car- .said baseplate andhaving one part thereof I riage controlling mechanism, the combina frictional contact with escapement wheel, ofama'rgin-dog for en On with a re easable ,feed rack and an gagementwith said wheel, a spring shoe on said margin dog for frictional contact with said rack, and'a' guard-on said dog to'control the point of fiexure of said spring shoe, said shoe lying between said guard and an arm of said dog, the'three parts being detachably secured together by screws and said guard preventing'said shoe from havv ing its point of flexure at a screw hole.

23. In a typewriting machine and in car riage controlling mechanism, the-combination of an escapement wheel whose teeth are made with-parallel back and front portions,

feed dogs cooperating with the ends of. said teeth, and a detent lying tangentiallyof said wheel and pivoted-to the 'fixed'fra nework of the machine and arranged to swing laterally into and of said parallel side portions teeth.

24. In a typewriting machine and in. carriage controlling: mechanism, tion with an 'escapement wheel, of a detent out of position to engage one ofeach of said dog arranged to' swing in and out, of said wheel transversely to the wheel, said dog having a-face for engagement with the backs the combina ofthe teeth of the wheel to prevent back- I ward rotation of the wheel and said dog having also an inclined p'art' whereby the.

dog is cammed aside by each passingtooth .of the wheel.

' 2h. In a typewriting machine and incarriage controlling mechanism, the combination with a carriage escapement wheel and cooperating feed dogs, of an adjustable support,'and a margin dog and a detent mounted on said support.

26. In a typewriting machine and in oer riage controlling mechanism, the combinationwith a, carriage escapement wheel and cooperating feed dogs of an adjustable sup I 7 port, and a margin dog and a detent-mount- S "of ed on said support and both same tooth of said wheel. 7

1 ned .at the borough oi-Manhattan, cit

ew York, in'the M York this 3rd day of 15 OSCAR WO'ODWARD;

and State of New April, A; D. 1919.

- Witnesses:

CHARLES 118mm,, E. M. WELLS fl engaging the county of New Yor 

